--/*
-- * Copyright (c) 2022 KCloud-Platform-Alibaba Author or Authors. All Rights Reserved.
-- *
-- * Licensed under the Apache License, Version 2.0 (the "License");
-- * you may not use this file except in compliance with the License.
-- * You may obtain a copy of the License at
-- *
-- *   http://www.apache.org/licenses/LICENSE-2.0
-- *
-- * Unless required by applicable law or agreed to in writing, software
-- * distributed under the License is distributed on an "AS IS" BASIS,
-- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- * See the License for the specific language governing permissions and
-- * limitations under the License.
-- *
-- */

if redis.call('exists',KEYS[1]) == 1 then
    redis.call('del', KEYS[1])
    return true
else
    return false
end